A cold-formed spring steel for stabilizer bars and a method for manufacturing the same

The silver-bright material, designed with specific chemical composition and precise process parameters, solves the problems of high precision, low bending, and surface quality of spring steel bars for cold-formed stabilizer bars, achieving high strength, high plasticity, and no hardened layer, thus meeting the manufacturing requirements of cold-formed stabilizer bars.

CN122406098APending Publication Date: 2026-07-17JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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Patent Information

Application Number
CN202610275555.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing spring steel bars for cold-formed stabilizers cannot simultaneously meet the requirements of high dimensional accuracy, low bending, no surface hardening layer, and excellent mechanical properties, which leads to surface cracking problems during cold forming.

Method used

Spring steel quenched and tempered silver bright material with specific chemical composition ratios, including precise control of C, Si, Mn, Cr, P, and S, combined with continuous casting and rolling process and fine process parameter design, including large reduction rolling, micro reduction fine straightening and precision polishing, to remove surface decarburization and hardened layer, meeting the usage requirements of cold-formed stabilizer bars.

Benefits of technology

It has achieved a high-strength, high-plasticity, silver-bright material without surface decarburization and hardening layer, which solves the surface cracking problem in cold forming and meets the low-energy consumption and high-efficiency production needs of the automotive industry.

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Abstract

本发明公开了一种冷成型稳定杆用弹簧钢调质银亮材及其制造方法，银亮材的化学成分按质量百分比计为 C：0.52～0.59％，Si：≤0.40％，Mn：0.70～1.00％，Cr：0.70～1.00％，P / S≤0.020％，余量为 Fe 及杂质；该银亮材为 18～35mm 圆钢，弯曲度≤1mm / m，抗拉强度 1200～1300MPa，断面收缩率≥30%，表面无脱碳，加工硬化深度≤10μm，尺寸精度 h9 级。其制造方法包括 BOF 转炉冶炼→LF 精炼→RH 处理→连铸→控温轧制→飞剪预切断→剥皮→淬回火→精矫直→无心磨磨光等工序，限定飞剪超速 4‑10%、精矫直压下量 0.008‑0.015mm、无心磨磨削量 0.05‑0.20mm 等关键参数。本发明的银亮材解决了冷成型加工表面易开裂的问题，制造方法采用连铸连轧低成本工艺，简化了冷成型稳定杆的生产流程，降低能耗，具有良好的产业化价值。
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